Hey guys, I just got a new M&P sport II and took it to the range yesterday and today. I used the 30rnd Pmag it came with along with a box of 300 rounds of Federal Black Pack 223 Rem. 55 GR ammo. Within the first magazine I had issues of it firing a couple rounds fine, then a click, with no bang. Take out magazine, rack a new round, same thing. A few shots all good then a click. Examined the round that was chambered but not fired and it appears the primer was struck and its shell casing has a scuff mark, slightly crushed almost to where the bullet was borderline bent. It did this off and on yesterday so today I bought a new pmag and a box of federal American eagle 5.56X45mm, 55GR. No issues using the new mag and 20rnds of 5.56, no failures what so ever. Then I used the new mag with the previous 223 ammo and same thing was happening as previous day. Any idea what it might be? I’ve included pics of the failed rounds. The gun was thoroughly cleaned and lubed prior to the range visit.